Conventional CRT projection televisions offer the best picture quality of the three you mentioned. They have the best black levels ( blacks tend to look black, not grey). They offer the sharpest potential picture. They're also the cheapest since they've been around longest. DLP or LCD rear projection are next in line. The digital atifacts created by the video scalers on conventional resolution broadcasts can be annoying, though. Plasma is retina searing bright with below average black levels. But it is thin.